it starred katy perry. [ music ] >> usher and the cast of glee also performed, but it was michelle obama's hair do is what folks were talking about. >> this is what inauguration is all about. it's about celebrating who we are as americans and all the things that make this country so great and when i think about who we are, when i think about what makes america great, i think about all of you, our men and women in uniform, our military spouses, and our amazing military kids. >> today was also something called gun appreciation day. thousands of gun advocates gathering across the country to rally against the president's proposals to reduce gun violence. >> too many in this country have been silent too long. we cannot -- we cannot -- we cannot be silent any longer. those 20 beautiful children who lost their lives in newtown are no longer able to speak for themselves. we have to speak for them. >> trying to outlaw certain black guns because they're black guns and hold large rounds of ammunition isn't going to do anything to stop those monsters >> i don't think it's really something they should